Part 8. Changing Software; Changing System Software; Changing Central Processor (Cpm) Software In Ksu; Changing Local Processor (Lpm) Software In Expansion Ksu - Samsung DCS Installation Manual

Samsung DCS Part 8
Installation March 2001

Part 8. Changing Software

WARNING
The DCS system contains CMOS components which are prone to damage by static electricity.
Take antistatic precautions when working on this equipment (see BS 5783).

8.1 Changing System Software

The system software on the DCS is contained in the ROM card. This card is fitted with a removable
door which must be removed to allow the software to be changed (Figure 8–1). The four EPROM
chips are located at one end of the PCB and are labelled U11 (EVEN 1), U12 (ODD 1), U13 (EVEN
2) and U14 (ODD 2) (Figure 8–2). These chips should be removed gently using a chip extraction tool
while taking note of the orientation of the chips. After the old chips have been removed, position the
new chips over the appropriate sockets in the correct orientation. Make sure that the legs are aligned
correctly and gently press the chips into their sockets. The ROM card door can now be refitted.

8.2 Changing Central Processor (CPM) Software in KSU

The KSU has a separate processor that is used for local control. This is known as the central proces-
sor or CPM. At times it may be necessary to change this processor's software. The CPM software
consists of a single EPROM located on the KSU motherboard under the power supply unit (PSU)
(Figure 8–3). To change this software, the PSU must be removed from the cabinet along with any
card modules that prevent access to the EPROM. The EPROM can now be gently removed using a
chip extraction tool while taking note of the orientation of the chip. The new EPROM can now be
inserted by positioning it in the correct orientation, aligning the legs with the socket on the mother-
board and gently pressing the chip into place.
8.3 Changing Local Processor (LPM) Software in Expansion
KSU
Each expansion KSU has a separate processor that is used for local control. This is known as the lo-
cal processor or LPM. At times it may be necessary to change this processor's software. The LPM
software consists of a single EPROM located on the expansion KSU motherboard under the power
supply unit (PSU) (Figure 8–4). To change this software, the PSU must be removed from the cabinet
along with any card modules that prevent access to the EPROM. The EPROM can now be gently re-
moved using a chip extraction tool while taking note of the orientation of the chip. The new EPROM
can now be inserted by positioning it in the correct orientation, aligning the legs with the socket on
the motherboard and gently pressing the chip into place.
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